Time invariance of three-dimensional morphology of equiaxed dendrite: A phase-field study
Time invariance of three-dimensional morphology of equiaxed dendrite: A phase-field study
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等轴枝晶三维形貌的时不变性：相场研究
DOI：
10.1016/j.commatsci.2021.111173
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发表时间：
2022
影响因子：
3.3
通讯作者：
Ohno Munekazu
中科院分区：
文献类型：
--
作者：
Yamada Ryo;Kudo Mikihiro;Kim Geunwoo;Takaki Tomohiro;Shibuta Yasushi;Ohno Munekazu
枝晶形貌对大块金属材料中的溶质偏析和流体流动有重要影响。因此，详细的形态演变的树突是重要的，以更好地理解这些过程。最近，三维（3D）枝晶形态已被分析使用的界面形状分布（ISD）地图，由局部固-液界面的弯曲度和形状因子在Al-Cu合金。通过使用同步辐射成像技术的原位观测收集数据[J.W. Gibbs等人：Sci.代表：5（2015）11824]。这种方法对于描述三维枝晶是非常有效的。在这项研究中，我们彻底研究了形态的演变和相关的ISD地图的自由生长等轴枝晶在Al−3mass%Cu合金使用定量相场模型。的ISD被发现不同的过冷度的程度。重要的是，结果表明，在足够的分支和生长的二级臂后，当过冷度足够大，足以产生一束分支时，存在时不变的特征。时间不变性被认为是等轴枝晶生长的普遍特征。
Dendrite morphology has a significant effect on solute segregation and fluid flow in bulk metallic materials. Therefore, the detailed morphological evolution of dendrites is important to better understand these processes. Recently, three-dimensional (3D) dendrite morphology has been analyzed using interface shape distribution (ISD) maps that are spanned by the curvedness and shape factor of the local solid−liquid interface in an Al−Cu alloy. Data were collected through in-situ observations using synchrotron radiation imaging techniques [J.W. Gibbs et al.:Sci. Rep.,5(2015) 11824]. This methodology is quite effective for describing 3D dendrites. In this study, we thoroughly investigated the morphological evolution and the related ISD map of free-growing equiaxed dendrites in an Al−3mass%Cu alloy using a quantitative phase-field model. The ISD was found to differ depending on the degree of undercooling. Importantly, the results indicate the presence of a time-invariant feature after sufficient branching and growth of secondary arms, when the degree of undercooling is substantial enough to produce a bunch of branching. The time invariance is considered a universal feature of equiaxed dendrite growth.
柱状树枝状结构的渗透性
DOI：
--
发表时间：
2020
期刊：
影响因子：
--
作者：
Y. Mitsuyama;T. Takaki;S. Sakane;Y. Shibuta;M. Ohno
通讯作者：
M. Ohno
影响因子：
9.4
作者：
T. Takaki;S. Sakane;M. Ohno;Y. Shibuta;T. Aoki
通讯作者：
T. Takaki;S. Sakane;M. Ohno;Y. Shibuta;T. Aoki
影响因子：
3.3
作者：
Gibbs, John W.;Voorhees, Peter W.
通讯作者：
Voorhees, Peter W.